http://www.ted.com/talks/kenneth_shinozuka_my_simple_invention_designed_to_keep_my_grandfather_safe#t-332603
I have watched this ted talk from Kenneth Shinozuka where he explains what he has invented to help his grandfather and other people who have Alzheimer's. His idea consists of a sensor placed in the heel of the patient's sock which is connected to the caregiver's smartphone. This way, when the elders put their feets on the floor the caregivers know it because their phones start ringing.
In my opinion, it's a great improvement for people who is affected by this disease. Someone could think it's simple and not so amazing. However, it's very practic and it can make a difference in their lifestyles. Furthermore, this creation could be applicable to solve other problems.